Elmo's World is a segment that is shown at the end of the long-running American children's television program Sesame Street which premiered on November 16th, 1998, as part of a broader structural change to the show. It originally lasted fifteen minutes at the end of each episode. The segment ran until 2009, and then returned in 2017. The segment was designed to appeal to younger viewers and to increase ratings, which had fallen in the past decade. The segment is presented from the perspective of a three-year-old child as represented by its host, the Muppet Elmo, performed by Kevin Clash in the original series and Ryan Dillon in the 2017 reboot.